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abbr. 日本商务改善协会（Better Business Bureau）；血脑屏障
🗣️ 情景例句
Do you know anything about South American culture?
你了解南美洲的文化吗？
The distinction of our product is its light weight.
我们产品的特点就是它很轻。
You can kill two birds with one stone.
一举两得。